I'm about to start riveting my wing skins on and I was wondering how exact I have to be with the main spar being level to the table. I have some wood blocks underneath that get me pretty close to level when it is clamped down.

Should I get my level out and ensure X and Y are both level w.r.t. to main spar? Do you think that the pre-punched holes in the wing ensure that there is no warping in the final product?

I'm about to start riveting my wing skins on and I was wondering how exact I have to be with the main spar being level to the table. I have some wood blocks underneath that get me pretty close to level when it is clamped down.

Should I get my level out and ensure X and Y are both level w.r.t. to main spar? Do you think that the pre-punched holes in the wing ensure that there is no warping in the final product?

When I skinned my wings, I set the spar up on 4 saw horses and shimmed it until everything was level. When I finally fitted the wings and clecoed the rear spar hole, I measured the @#$% out of them and found that they were not as much as 1/16" out anywhere. Final drill the rear spar bolt hole and move on......

Now, it's possible that I am simply an ace builder or that the pre-punched holes would have done the job anyway...........

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